Collision Theory Reaction Mechanisms Spontan. reactions Equilibrium Misc. F

Collision Theory These must be broken and reformed in a chemical reaction. Back to the big board

Collision Theory How and why does an increase in temperature affect reaction rate? Back to the big board

Collision Theory Draw a reaction progress curve for an exothermic reaction. Back to the big board

Collision Theory The unstable arrangement of atoms that exists between reactants and products Back to the big board

Collision Theory Describe how a catalyst speeds up the rate of a reaction. Back to the big board

Reaction Mechanisms This is a reaction that consists of only one step. Back to the big board

Reaction Mechanisms A substance that is a product of one reaction and immediately becomes a reactant in another reaction. Back to the big board

Reaction Mechanisms Draw a reaction progress curve for a 2-step (slow then fast) endothermic reaction. Back to the big board

Reaction Mechanisms This includes all the elementary reactions in a complex reaction. Back to the big board

Reaction Mechanisms On a reaction progress curve, the hills represent these. Back to the big board

Spontan. Reactions The two possible driving forces behind chemical reactions. Back to the big board

Spontan. Reactions When is this reaction spontaneous? I 2 (g) --> I 2 (s) kJ Back to the big board

Spontan. Reactions When is this reaction spontaneous? 2H 2 O 2 (l) --> 2H 2 O(l) + O 2 (g) + 98kJ Back to the big board

Spontan. Reactions When is this reaction spontaneous? 3O 2 (g) + 284kJ --> 2O 3 (g) Back to the big board

Spontan. Reactions When is this reaction spontaneous? 2Al 2 O 3 (s) kJ --> 4Al(s) + 3O 2 (g) Back to the big board

Equilibrium K + O 2 --> 2K 2 O If there is 95% K 2 O, 4% K, and 1% O 2 at equilibrium, are reactants or products favored? Back to the big board

Equilibrium This is how a catalyst will affect the equilibrium position of a reaction Back to the big board

Equilibrium How do the rates of the forward and reverse reactions compare at equilibrium? Back to the big board

Equilibrium Write the equilibrium constant expression for: 2Ca + O 2 --> 2CaO Back to the big board

Equilibrium Write the equilibrium expression for the combustion of methane (CH 4 ) Back to the big board

Misc If K eq = for a reaction, are reactants or products favored? Back to the big board

Misc Zn + 2HCl H 2 + ZnCl 2 Which way will equilibrium shift if more HCl is added? Back to the big board

Misc SO 2 (g) + O 2 (g) --> 2SO 3 (g) + 198kJ What is/are the driving force(s) behind this reaction? Back to the big board

Misc SO 2 (g) + O 2 (g) --> 2SO 3 (g) + 198kJ Which way will equilibrium shift if pressure is decreased? Back to the big board

Misc CO(g) + O 2 (g) --> 2CO 2 (g) Assuming this reaction is spontaneous, is it exothermic or endothermic? Why? Back to the big board

Final Jeopardy! LeChatalier’s Principle And the answer is...

SO 3 (g) + H 2 O(l) --> H 2 SO 4 (aq) + 130kJ Which way will equilibrium shift if this system is cooled?